I am sorry for this delayed reply to your gardening question. The spring rush has brought a deluge of questions and we are working hard to catch up!
Your insect description sounds like whiteflies, and their larvae and pupae. There are other products to try including sprays of neem oil which must be directed upward to contact the lower leaf surfaces. Repeat every 10 days or so for several sprays. Products with imidocloprid are systemic and are another good option. Read the label carefully and follow it exactly for best results.
Thanks for the question. Best wishes for a wonderful gardening season. Please stop in again soon!
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